Low-lift pump



D ec 25, 1928.

S. L. MENGE LOW LIFT PUMP Filed March 9, 1928 2 Sheets-Sheet l Snucntor5. L. LM?

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S. L. MENGE LOW LIFT PUMP Filed March 9. 1928 2 Sheets-Sheet. 2

Patented Dec. 25, 1928.

UNITED *STATESA SIDNEY L. MENGE, OFNEW ORLANS, LOUVISIANA.

LOW-LIFT PUMP.

Application filed March 9, 1928. Serial No. 260,527.

Reissued Letters Patent .to J oseph Menge,

No. 11,214, dated December 20, 1891; also Letters Patent to JosephMenge, No. 171,485,

granted March 22, 1892; also Letters Patent to Sidney L. Menge, Nos.950,398, granted February 22, 1910; and 1,630,180, granted May si, 192

In this type of pump, there is a free passage for the water, which ispushed through without being subjected to any material pressure, therebydiffering from snail or other force pumps. y

My present invention will be more fully understood after reference tothe accompanying drawings, in which like parts are indicated by similarreference symbols throughout the several views, and in which Figure 1shows a sectional elevation through the center of the pump casing, inwhich a rect-angular wooden box isused, the propeller and pump shaftbeing shown in elevation.

Figure 2 shows a section along the line 2-2 of Figure l, looking down. l

Figure 3 shows a modification, in which the pump casing is made of metaland substantially cylindrical in form, and

Figure 4 shows an inverted plan view of..

the construction shown in Figure 3.

Referring first to Figures 1 and 9., A represents the pump casinopreferably having' the closed bottom A, so that the casing may be set upon the bottom of the ditch or the drain. Above the bottom, inletopenings A0 are provided for the influx of water. At the corners of thebox are provided vertical beams A2, to which the sides of the pumpcasing are attached. The top of the casing is open, as shown in Figure1, and carries the cross beams A3 and A4, as shown in said figure.

One side of the pump casing is provided with an outlet passage above thedelivery trough B, which may be made of wood, and should be suitablybraced, as by the braces C. D and D represent two shelves, which aremounted above and below the housing E, and

which shelves are provided with a circular opening in the center thereofto register with t-he opening through the housing aforesaid, as will behereinafter described.

kThis housing E is provided with a tapered"y bore e in the form of afrustrum of anV inverted cone, the elements of said cone having a veryslight inclination, and below and '35 above this tapered bore, thehousing is flared outward, as at e and e2, so as to give a free."passage forv the water, as it is pushed upward through the pump.

The purpose of the entering and leavingiifl) cones@ and e2 is togradually increase the velocity of th-e flow of the water from theentrance velocityy at Ao to that which thewater will attain in thepropeller chamber e, The purpose of the inverted cone e2 Vis to 7 yChgradually reduce this velocity to a much lower velocity in the dischargechamber; thereby causing an increase in efliciency. These cones e, e ande2 also havethe additional purpose of reducing the whirl in the S0water, caused by the rapidly rotating screw propeller.

Below the shelf D, I provide a cross piece F, preferably triangular incross section, to facilitate the flow of water, carrying the bearing Gfor the lower end of the propeller yshaft H, to which shaft the hub I ofthe propeller is secured, said propeller having blades I', which bladesareY of. a suitable pitch to lift the water to thedesired height.

Above the shelf D may be provided a cross piece F also preferablytriangular in cross section,.carrying the journal bearing G for the pumpshaft, and above the beam A2, I provide an anti-friction bearing J,preferably a ball bearing, having balls y' on which the base of the nutK rests.

This ball bearing and nut form a'suspension bearing on which the weightof the propeller and its shaft is normally suspended, and when in use,this bearing also serves as a thrust bearing to resist the downwardpressure of the water as it is forced upward.

This nut is adjustably mounted on the screw thread /L on the upper endof the shaft, and if desired, a lock nut K may also be used. Thepropeller shaft is adjusted vertically by screwing up or easing up onthis nut K, so that the propeller blades will just clear the conicalbore e, and as the tips wear', as will occur due to the presence ofsand, grit or the like in the Water as it goes upward, by easing up onthis nut K, the shaft A is permitted to descend slightly, and the tipsof the propeller blades will just clear the lower portion of the boreWhere the calibre is somewhat less. By this arrangement, the tips of thepropeller blades may be conveniently adjusted, so as not to touch, butjust clear the adjacent portion of the bore of the housing E.

The propeller shaft may be driven in any convenient Way, as by means ofa pulley/,or by direct connection with a motor, not shown.

lllhile l have shown, in Figures l and 2, a circular' housing E in arectangular pump casing, l recognize that a rectangular casing has itsdisadvantages with regard to the free circulation upward of the Water,but it has its advantages, owing to cheapness of construction andfacility with which the parts may be assembled and used.

But in order to secure a somewhat increased efficiency of the pump, thepump casing may be made free from angles or of a. substantiallycylindrical form such as is shown in Figures 3 and 4, in which thevcasing is made of tivo parts, the lower part M being flared at thebottom, as at m, and provided with a flange m at the top. ln this bottomsection, l pro-v vide the housing E, having the tapered bore c and theconical surfaces e and e2, as already described With reference toFigures l and 2.

' On top of this section M, l provide a spider N, having its ends nresting on the flange m at the upper end of the section M. The uppersection M of the pump casing has a delivery passage M0 between thecurved guide surfaces m3 and m4. Above the outlet passage, the pumpcasing may be continued in the cylindrical form, as at M, if desired.

The propeller hub I, carrying the blades l', is secured on the shaft H',which passes through the journal bearing a and m5 and also through theanti-friction bearing j, which is supported on the head O` of the pumpcasing. The' nut K rests on the ball j, and this nut forms a suspensionVand thrust bearing for the propeller shaft. This nut may be adjusted sothat the tips of the blades I may be set at the desired distance fromthe bore e',

hereinbefore described.

ln addition to the nut K, l may provide a loch nut K, if desired.

The propeller shaft may be driven in any suitable Way, as by a pulley,gear or other arrangement carried by the extension shaft H2 connected bythe coupling members It and h2 to the propeller shaft l-l. ln this formof pump casing having the iared bottom M, obviously this must be raisedclear of the ground, and for this reason, l provide supporting bracketsP, which may rest on any suitable frame Work, not shown.

lfilhile l have illustrated and described tivo embodiments of theinvention in the preferred forms, it will be obvious that variouschanges could be made in the construction, combination and arrangementof parts, Which could be used Without departing from the spirit of myinvention, and l do not mean to limit the invention to such details,except as particularly pointed out in the claim. I

Having thus described my invention, what l claim and desire to secure byLetters Patent of the United States is A propeller pump comprising acasing provided with a lower or suction chamber and an upper or deliverychamber, Wit-h means for ad mitting Water to the lower chamber, and forcarrying it od from the upper chamber, a partition mounted between saidchambers and provided with a bore in the form of the frustum of aslightly tapered inverted cone, said partition being` provided Withfrusto conoidal faces flaring outwards above and below said bore, ashaft journalled in said casingconcentric With said bore, and a screwpropeller mounted on said shaft and having the tips of its blades inclose proximity to said bore.

SlDNEY LAVRENCE MENGE.

